Circuit Block Diagram - Casio CASSIOPEIA EG-800 Service Manual And Parts List

10. CIRCUIT BLOCK DIAGRAM

Timer clock
OSB
KEYS
Action/ Voice etc.
Instruction/ Cache Mem.
VSUB
Bus Control Unit
(Key PCB)
RESET POWER ON/OFF
IC 1
System clock
45.158MHz
GATE ARRAY (ASIC): KUJIRA
*KUJIRA is a Japanese nickname for this Gate Array, and
can not be replaced as well as above CPU because of BGA
* For Communication and LCD drive/control etc.
Fast IrDA clock
48MHz
CF/MODEM
Card
(US and
Canada only)
IrDA
Mpdule
CRADLE
PC
(From AC adapter)
System clock for CPU
32.768kHz
PLL OSB
150MHz
CORE of CPU
MIC
IC300
* Battery Power detection
* Touch Panel IF
* HP/ SP drive
Power supply
Mobile
Phone (US & Canada
only)
18.432MHz
CPU
IC2
(BGA)
VR4122
General Purpose
Interface
Alarm LED
(RED)
LED IF
DATA BUS
ADDRESS BUS
Back light
Voltage
LCD (TFT) Module
240 x 320 dots
VCOM
IC401
MODEM
To Analog Telephone line
— 55 —
IC700
IrDA Module
IC200
Power IC
* Power supply
* Voltage regulator
* Voltage detection
* Charge control
Charge LED
DC/AC
Inverter
(Amber/ Green)
DRAM x 2
ROM x 2
IC1/IC2
DRAM1/ DRAM2
16 Mbytes
32 Mbytes
(16 Mbytesx2) (8 Mbytesx2)
VSUB
IC303
Battery power detection
Touch Panel
Speaker
CRADLE
Rechargeable
Battery
AC Adapter
AD-C59200
(To Cradle)
V5LCD
Headphone